Windmill



FIG. 1 is a perspective view of a windmill showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof, the left side being a mirror image of the right side shown; and,

FIG. 5 is a top plan view thereof, the bottom plan being a mirror image of the top plan view. 

The ornamental design for a windmill, as shown. 